2D Artwork: Fan comic autobot redesigns

Hi all
in association with the transformers fan group 'tf:the lost seasons' i have been writting and drawing a comic called 'war flames'.
So far only the first 2 parts of 6 are on deviantart at the mo.

Basically, a small group of autobots upgrade to beast modes and go back in time to earth's distant past.

This here is my character designs for the autobots.
All transformations are plausable imho- blurr's transformation guide i already have posted on da. The other guides i will write up soon.

im gonna have huffer as a deer for a background character. i know that a deer isnt very fitting for the character but its kind of a joke between me and a huffer fan.
and starscream is the main back guy (you'll have to see the comic so far to see his design and alt mode).
i wonder what would work well for springer. a griffin perhaps?